TPM changes:
Make all drive names defined with U_BOOT_DRIVER unique
TEE changes:
Rework things such that sandbox will also traverse the optee directory
when SANDBOX_TEE is enabled, but only build one of the optee-specific
files when OPTEE is enabled.
EFI changes:
Up to now we were relying on the file extension to accept and load
an image over HTTP. We expected images to be either .iso or .img.
By wiring up internal existing functions we can try to mount any
file extension and reject it only if mounting fails.
part_driver_lookup_type